From de96f39392fedb5f2f538377a57ba52b2d7e346f Mon Sep 17 00:00:00 2001
From: Sanjay Patel <spatel@rotateright.com>
Date: Tue, 17 May 2016 19:25:55 +0000
Subject: [PATCH] [InstCombine] add test for wrong icmp constant (PR27792)

The code fix for this was checked in at r269797.

llvm-svn: 269803
---
 llvm/test/Transforms/InstCombine/icmp.ll | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/llvm/test/Transforms/InstCombine/icmp.ll b/llvm/test/Transforms/InstCombine/icmp.ll
index 24a539be2b60..099d15944ab5 100644
--- a/llvm/test/Transforms/InstCombine/icmp.ll
+++ b/llvm/test/Transforms/InstCombine/icmp.ll
@@ -2097,3 +2097,15 @@ if.then3:                                         ; preds = %if.end
 return:                                           ; preds = %if.end, %entry, %if.then3
   ret void
 }
+
+; When canonicalizing to 'sgt', make sure the constant is correct.
+
+define i1 @PR27792(i128 %a) {
+; CHECK-LABEL: @PR27792(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp sgt i128 %a, -1
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %cmp = icmp sge i128 %a, 0
+  ret i1 %cmp
+}
+